2361.54% is the change from 13 to 320
Calculation steps:
[( 320 - 13 ) ÷ 13] x 100 = 2361.54%
Formula
Percentage change = [(320 - 13) / 13] x 100
Subtract the new number by the original number
320 - 13 = 307
307 ÷ 13 = 23.615384615384617
23.615384615384617 x 100 = 2361.54%